Using a game by Bishop.
Toudou Miyuki and Sanada Eiji are teachers inside the same school and lovers. They'd decided they would preserve their chastity until these are married. However, Miyuki is assaulted and loses her virginity to Takuya, Eiji's step-brother. Furthermore, it doesn't stop there as Takuya turns his attention on the other instrument female teachers one by one.
